William b



intra www WILLIAM B. WTKINS, OF JERSEY ClTY, NEW" JERSEY.

LaarsPamNa. 88,825, dans apatia, 1869. 'i i mauve-o 'room-Banen.

The Schedulereferired to in these Letters Patent and malng part ofthesam I To all whom 'it may concern.-

Be it known that I,W1LL1AM B. WATKINS, of Jersey City, State ot' NewJersey,have invented certain new and useful Improvements in Securing orAttaching India-Rubber Brushes for Cleaning Teeth, and other purposes,to Handles; and I do hereby declare that the following is a fulldescription of the saine.-

The nature of my invention consists in forming the back of the brushwith a rib or tongue, lengthways of it, of a dovetail or other suitableshape, and having an opening through it in which is inserted a piece ofmetal, or other hard material, so as to make the rib stili and irm, thatwhen inserted into the dovetail channel, cut in the lower side of thehandle, it will wedge fast therein, and thus make not only a solidattachment of the brush to the handle, but also make the brush lessbulky, and more easily inserted in the mouth, aswell as more desirable.in style of finish.

Figure 1 is a side view of the brush as secured to a handle.

Figure 2 is a longitudinal cut section of the same.

Figure 3 is cut section of the ,same through the line a: x, fig. 1.

Figures 4 and 5 are an end view of the brush and handle, showing the ribon its back and channel in the handle.

Letter A represents the brush or bristles, which are formed by mouldingwhen the rubber is in a plastic state, and

B, the back, having a rib or dovetail tongue, C, formation of rubberdown its length, and stitened by means of a piece of metal, or hardmaterial, D, upon which the lib or tongue is formed while in the plasticstate.

The object of this combination of the stifener D with the rib, and backof the brush will be obvious, for the reason that, as the brush is ofsuch a pliable and compressible nature, it would, in the first place, bealmost impossible to insert or draw the rib into the dovetail channel E,in the handle F, tight enough to secure the brush to the handle; and,second, that even if it could be inserted by great labor, yet it wouldtwist out of the channel by side pressure on consequence of its elasticproperties. Therefore the stiffener D is intended for the twofoldpurpose of facilitating the attachment of the brush to the handle, andthus, by saving time, cheapen the cost of making the brush, andpreventing the brush from getting detached from the handle by anyaccdental use thereof.

- It will he obvious that the same method of securing the brush to thehandleI may be made so as tooperate in transverse dovet-ail channels inthe lower side of the handle, and though I esteem the mode of securingthe brush to the handle in a longitudinal channel, as hereiubeforedescribed, the best way to make the attachment, yet, as such transversechannels may be used, I desire it to be uuderstomi that I consider myinvention to include either method as being but-slight modifica? tionsof the same thing. c

Having now described my invention, I will proceed to set forth what Iclaim, and desire to secure by Let-1 ters Patent of the United States,promising, however, that I do notclaim India-rubber brushes, where therubbers are substituted for the bristles commonly used; nor do I claiman India-rubber brush having a hollow head, in combination with a handlehaving a tenon on its end, as described in Thomas Maitlands patent for atooth-brush; but

The combination of the India-rubber brush with the handle, by means ofthe rib O, having a stiener, D, in it, and dovetail channel E, in thelower side of the handle, as hereinbefore set forth. i

W. B. WATKINS.

Witnesses:

CHARLES L. BARRifrr, FPANKLIN BARRETT.'

the brush, in v

